Foundation November 2020 Paper 3 Q21
21 Vectors \(\mathbf{a}\) and \(4\mathbf{b}\) are drawn on the grid.
(a) Write vector \(\mathbf{a}\) as a column vector. [2]
(b) Find vector \(\mathbf{b}\) as a column vector. [2]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \(\begin{pmatrix} 4 \\ -2 \end{pmatrix}\) | 2 | B1 for 1 component correct If 0 scored, SC1 for \(\begin{pmatrix} -4 \\ 2 \end{pmatrix}\) or \(\begin{pmatrix} \frac{4}{-2} \end{pmatrix}\) or (4. −2) | Penalise first appearance of vinculum or poor form in vector but condone second use |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \(\begin{pmatrix} 1 \\ \frac{9}{4} \end{pmatrix}\) oe | 2 | B1 for 1 component correct or \(\begin{pmatrix} 4 \\ 9 \end{pmatrix}\) seen | |